From: Kirk M. <km...@ec...> - 2005-05-19 14:26:45
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255 is -1 as a signed char Kirk At 14:57 19/05/2005, you wrote: >Hello ! > I just found something strange : >Following lines work differently on gumstix and my x86 : > char c=3D-1; > printf("char value : %d\n",(int)c); > > my gumstix says : > char value : 255 > > my computer says : > char value : -1 > > Doesn't anybody know where does this difference comes from ? > > Thanks, >Jerome > > >here are my compilers versions : >********************* for x86 > g++ -v > Lecture des sp=E9cification =E0 partir de=20 > /usr/lib/gcc-lib/i486-linux/3.3.5/specs > Configur=E9 avec: ../src/configure -v >--enable-languages=3Dc,c++,java,f77,pascal,objc,ada,treelang >--prefix=3D/usr --mandir=3D/usr/share/man --infodir=3D/usr/share/info >--with-gxx-include-dir=3D/usr/include/c++/3.3 --enable-shared >--enable-__cxa_atexit --with-system-zlib --enable-nls >--without-included-gettext --enable-clocale=3Dgnu --enable-debug >--enable-java-gc=3Dboehm --enable-java-awt=3Dxlib --enable-objc-gc >i486-linux > Mod=E8le de thread: posix > version gcc 3.3.5 (Debian 1:3.3.5-12) > > ********************* for arm > /.../build_arm_nofpu/staging_dir/bin/arm-linux-g++ -v > Reading specs from= /.../build_arm_nofpu/.../gcc/arm-linux-uclibc/3.4.2/specs > Configured with: /.../toolchain_build_arm_nofpu/gcc-3.4.2/configure >--prefix=3D/.../build_arm_nofpu/staging_dir --build=3Di386-pc-linux-gnu >--host=3Di386-pc-linux-gnu --target=3Darm-linux-uclibc >--enable-languages=3Dc,c++ --enable-shared --disable-__cxa_atexit >--enable-target-optspace --with-gnu-ld --disable-nls --with-float=3Dsoft >--enable-sjlj-exceptions > Thread model: posix > gcc version 3.4.2 > > >------------------------------------------------------- >This SF.Net email is sponsored by Oracle Space Sweepstakes >Want to be the first software developer in space? >Enter now for the Oracle Space Sweepstakes! >http://ads.osdn.com/?ad_idt12&alloc_id344&op=CCk >_______________________________________________ >gumstix-users mailing list >gum...@li... >https://lists.sourceforge.net/lists/listinfo/gumstix-users - http://www.ecs.soton.ac.uk/~km=20 |